nkf:tldr:5af16

The command "nkf -d --overwrite ${filename-txt}" is used to convert a text file from a specific character encoding scheme to the default encoding scheme of the current system. Here is an explanation of each part of the command:

• "nkf" is the command itself, which stands for "Network Kanji Filter". It is a tool commonly used in Unix and Linux operating systems for manipulating and converting character encodings.

• "-d" is an option that tells nkf to convert the text file from a specific encoding to the default encoding. In this case, it means "decode".

• "--overwrite" is another option that tells nkf to overwrite the original file with the converted version. This is useful to update the file with the new encoding.

• "${filename-txt}" is a placeholder for the actual filename. The command assumes that the file has a ".txt" extension. You should replace this placeholder with the actual name of the file you want to convert.

To use this command, you need to have the nkf tool installed on your system. It allows you to convert text files between various character encoding schemes, which can be useful when working with files that have different encodings.